Hi mrs.green, no I was told by the same RE that the HCG trigger interferes with the accuracy of OPKs.
I tested this morning and bfn. They told me not to test until 14dpiui, but I wanted to see if the trigger had cleared and had been really patient up to then.
So as long as I don't see AF then I'll retest Saturday.
You're probably right about the progesterone testing, but just to be safe next cycle, I'm paying for it independent of my RE. I really think low progesterone has been a major factor in my inability to conceive the last 3.5 yrs.